1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Goryan [66]
3 years ago
12

Which statements best describe the work of Marie and Pierre Curie? Check all that apply.

Physics
2 answers:
morpeh [17]3 years ago
8 0

Answer:

They came up with the term “radioactivity.”

They conducted experiments with uranium-containing minerals and pure uranium.

They discovered two new radioactive elements.

Explanation:

As we know that the radioactivity is discovered by Marie and Curie and as per the experimental verification of the theory given by them we can say that rate of decay of a radioactive sample is directly proportional to the number of the radioactive same present at that time.

So it is given as

\frac{dN}{dt} = -\lambda N

so here they also discovered two new radioactive substance apart from all the experiments related to the Uranium

AleksAgata [21]3 years ago
4 0

B. They came up with the term “radioactivity.”

C. They conducted experiments with uranium-containing minerals and pure uranium.

E. They discovered two new radioactive elements

You might be interested in
I need a little help with this
Mandarinka [93]

Answer:

truck 1 has the most velocity

Explanation:

Because it weights less which means it faster and yea

3 0
3 years ago
The quality of ____ opposes the flow of electric current through a material .
QveST [7]
The answer is Resistance
3 0
3 years ago
Read 2 more answers
A spring is characterized by a spring constant of 60 N/m. How much potential energy does it store, when stretched by 1.0 cm?
Anestetic [448]

Answer:

3.0 x10^-3 J

Explanation:

The potential energy of a spring is given by PE = (0.5)k*x^2  

Where

K: Spring Constant = 60 N/m

x: displacement of the spring from its equilibrium position = 1cm = 0.01m

Then PE = 0.5(60)(.01)^2 = 0.003J = 3.0 x10^-3 J

8 0
3 years ago
Read 2 more answers
Calculate the electric field at one corner of a square 50 cm on a side if the other corners are occupied by 250x10-7C (charges)
SIZIF [17.4K]

The electric field at one corner of a square is 1614217 N/C.

Explanation:

The distance between x and y direction diagonals.

As per the given details the distance between diagonals is calculated as

0.5² + 0.5² = c²  =>  c = 0.707 m

Charge to the right:  In x direction

In order to find the electric charge towards x direction

we use e = kq/r² formula

As 'k' is coulomb's constant it's value is 9 x 10^{9} N m²/C²

e = (9 x 10^{9})(250 x 10^{-7}) / (0.5)²

e = 9 x 10^{5} N/C

Charge diagonal:

e = kq/r²

e = [(9 x 10^{9})(250 x 10^{-7}) / (0.707)²] cos 45

e = 225000√2 N/C

X direction sum = 1218198 N/C.

Similarly as shown in x direction the charge is same for y direction also

Charge below:  For y direction

e = kq/r²

e = (9 x 10^{9})(250 x 10^{-7}) / (0.5)²

e = 9 x 10^{5} N/C

Charge diagonal:

e = kq/r²

e = [(9 x 10^{9})(250 x 10^{-7}) / (0.5)²] sin 45

e = 159099 N/C

Y direction sum = 1059099 N/C

Resultant electric field strength:

1218198 ² + 1059099² = e²

e = 1614217 N/C [45 degrees below the horizontal]

4 0
3 years ago
Which best explains why the shape of a liquid can change?
topjm [15]
The particles in a liquid are extremely fast, not faster than a gas, but faster than a solid. The way the particles move allow you to get volume but not area for it doesn't have a defiant shape
3 0
3 years ago
Read 2 more answers
Other questions:
  • A satellites are placed in a circular orbit that is 2.44 × 107 m above the surface of the earth. What is the magnitude of the ac
    12·1 answer
  • Question 1
    8·1 answer
  • A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s while comin
    7·1 answer
  • Solve for the dog's displacement during segments A and B (0-20s)?
    7·2 answers
  • What is a measure of the pulling force of gravity?
    15·1 answer
  • I don't understand how to even begin to solve this, can someone help?
    14·1 answer
  • WHAT IS THE NET FORCE (CENTRIPETAL FORCE) FOR A 1500 KG
    14·1 answer
  • A metal bar magnet produces a magnetic field in space surrounding it. The point
    5·1 answer
  • The environment of Ecology is made up of how many levels?
    6·1 answer
  • Calculate the average force with which the Sun pulls the Earth. It will help to know
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!